生物圈是一种具有宇宙特征的行星现象。

The beauty of mathematics is that it allows us to explore the universe without ever leaving our chairs.

虚心和实腹的义理都很深奥，但首先要通过虚心才能认识本心。

"The only person you should try to be better than is the person you were yesterday."

不学习历史的人注定要重复错误。